You will require assembly sets for mounting of single elements. In order to reach a wall distance of 6-8 cm, a short assembly kit is required 1854406. To ensure that the walls can also be climbed from behind, a wall distance of approx. 40 cm is required. A long assembly kit 1854422 is required for that. In order to place several elements next to one another, you can adjust the outer element and move it 90 degrees into the space using a swivel device (product code: 1976830).